=encoding utf8
=head1 NAME
perl5150delta - what is new for perl v5.15.0
=head1 DESCRIPTION
This document describes differences between the 5.15.0 release and
the 5.14.0 release.
If you are upgrading from an earlier release such as 5.12.0, first read
L, which describes differences between 5.12.0 and
5.14.0.
Some of the changes have been included in Perl 5.14.1. These are
indicated with a "(5.14.1)" marker.
=head1 Core Enhancements
=head2 C works on all keywords
The C prefix can now be used on keywords enabled by
L, even outside the scope of C. Relevant
documentation files L, L, L, L, and
L have been updated.
=head2 C no longer requires the "switch" feature
The C keyword has two meanings. It can introduce a C
block after a loop, or it can exit the current C block. Up till now,
the latter meaning was only valid with the "switch" feature enabled, and
was a syntax error otherwise. Since the main purpose of feature.pm is to
avoid conflicts with user-defined subroutines, there is no reason for
C to depend on it.
=head2 C can be assigned to
C was made read-only in Perl 5.8.0. But only sometimes: C
would make it writable again. Some CPAN modules were using C or
XS code to bypass the read-only check, so there is no reason to keep C
read-only. (This change also allowed a bug to be fixed while maintaining
backward compatibility.)
=head2 Features inside the debugger
The current Perl's feature bundle is now enabled for commands entered in
the interactive debugger.
=head2 C can now have Unicode loose name matching
This is described in the C item in
L below.
=head2 Breakpoints with file names
The debugger's "b" command for setting breakpoints now allows a line number
to be prefixed with a file name. See
L.
=head1 Security
No changes since 5.14.0.
=head1 Incompatible Changes
=head2 Tying scalars that hold typeglobs
Attempting to tie a scalar after a typeglob was assigned to it would
instead tie the handle in the typeglob's IO slot. This meant that it was
impossible to tie the scalar itself. Similar problems affected C and
C: C would return false on a tied scalar if the last
thing returned was a typeglob, and C on such a tied scalar
would do nothing.
We fixed this problem before Perl 5.14.0, but it caused problems with some
CPAN modules, so we put in a deprecation cycle instead.
Now the deprecation has been removed and this bug has been fixed. So
C will always tie the scalar, not the handle it holds. To tie
the handle, use C (with an explicit asterisk). The same
applies to C and C.
=head2 IPC::Open3 no longer provides C, C
and C
All three functions were private, undocumented and unexported. They do
not appear to be used by any code on CPAN. Two have been inlined and one
deleted entirely.
=head2 C no longer caches PID
Previously, if one embeds Perl or uses XS and calls fork(3) from C, Perls
notion of C could go out of sync with what getpid() returns. By always
fetching the value of C via getpid(), this potential bug is eliminated.
Code that depends on the caching behavior will break. As described in
L, C is now writable, but it will be reset during a
fork.
=head1 Deprecations
There have been no deprecations since 5.14.0.
=head1 Performance Enhancements
There are no benchmarked enhancements since 5.14.0.
=head1 Modules and Pragmata
=head2 New Modules and Pragmata
None.
=head2 Updated Modules and Pragmata
=over 4
=item *
L has been updated from version 1.18 to version 1.22
L can now be invoked with a new option, C,
which is like the existing C option, but enables Unicode loose
name matching. Details are in L.
=item *
L has been updated from version 1.21 to 1.22.
=item *
L has been upgraded from version 0.48 to version 0.52
Includes a fix for FreeBSD to only use C if it is located in
C, as FreeBSD 9.0 will ship with a limited C in
C.
=item *
L updated from version 0.88 to 0.91
=item *
L has been upgraded from version 1.29 to version 1.30.
=item *
L has been upgraded from version 1.03 to 1.05. (Perl 5.14.1
had version 1.04.)
It addresses two regressions in Perl 5.14.0:
=over
=item *
Deparsing of the C operator and its diamond (C<< <> >>) form now
works again [perl #90898] (5.14.1).
=item *
The presence of subroutines named C or C no longer causes
B::Deparse to hang (5.14.1).
=back
Plus a few other bugs:
=over
=item *
Deparsing of handle C, C and C with a scalar argument
now works [perl #91008].
=item *
C followed by a complex expression (as opposed to a simple scalar
variable) now works.
=item *
It now puts C in front of overridable core keywords if they
conflict with user-defined subroutines.
=item *
Deparsing assignment to an lvalue method specified as a variable
(C<< $obj->$method = ... >>) used not to work [perl #62498].
=back
=item *
L has been upgraded from version 3.52 to version 3.54
The DELETE HTTP verb is now supported.
=item *
L has been upgraded from version 2.033 to version 2.035
=item *
L has been upgraded from version 2.033 to version 2.035
=item *
L has been upgraded from version 2.033 to version 2.035
=item *
L has been upgraded from version 2.110440 to version 2.110930
=item *
L has been upgraded from version 0.9103 to version 0.9105
Now understands specifying modules to install in the format 'Module/Type.pm'
=item *
L has been upgraded from version 0.54 to version 0.56
=item *
L has been upgraded from version 2.128 to 2.131.
=item *
L has been upgraded from version 1.821 to version 1.822
Warnings are now in sync with perl's
=item *
L has been upgraded from version 5.61 to version 5.62
No longer loads L as this was unnecessary.
=item *
L has been upgraded from version 1.07 to 1.08.
Its C function no longer refuses to write to copy-on-write
scalars.
=item *
L has been upgraded from version 2.42 to version 2.43
Missing aliases added, a deep recursion error fixed and various
documentation updates.
=item *
L updated from version 0.280203 to 0.280204.
The new version appends CFLAGS and LDFLAGS to their Config.pm
counterparts.
=item *
L has been upgraded from version 1.08 to version 1.39
C fixed to work with v5.14.0
=item *
L updated from version 0.85 to 0.87
=item *
L updated from version 1.50 to 1.51.
It no longer returns a wrong result if a script of the same name as the
current one exists in the path and is executable.
=item *
L has been upgraded from version 2.27105 to version 2.27200
Fixed C decoding string more correctly.
=item *
L has been upgraded from version 0.35_01 to version 0.36.
Fix broken URLs for RFCs.
=item *
L has been upgraded from version 1.10 to version 1.11.
=over 4
=item *
Fixes a bug which prevented use of C on Windows when C,
C or C had been localized.
=item *
Fixes a bug which prevented duplicating numeric file descriptors on Windows.
=back
=item *
L has been upgraded from version 1.993 to 1.994.
The C method has been corrected to return a normalised Perl number
(the result of C<0 + $thing>), instead of a string [rt.cpan.org #66732].
=item *
L has been upgraded from version 1.994 to 1.995.
It provides a new C method that complements the C method.
It fixes the internal C function's handling of "foreign objects"
so they are converted to the appropriate class (Math::BigInt or
Math::BigFloat).
=item *
L has been upgraded from version 1.56 to version 1.57
and L has been upgraded from version 1.20 to version 1.21.
Fixes include: correct copy constructor usage; fix polarwise formatting with
numeric format specifier; and more stable C algorithm.
=item *
L has been upgraded from version 2.49 to 2.51.
Updated for v5.12.4, v5.14.1 and v5.15.0
=item *
L has been updated to remove two broken URLs in the documentation.
=item *
L has been upgraded from version 0.38 to version 0.42
Eliminated use of C on array elements which has been deprecated.
=item *
L has been upgraded from version 1.10 to version 1.11.
The XS code is now compiled with C, which will aid
performance under ithreads.
=item *
L has been upgraded from version 0.14 to 0.15
=item *
L has been upgraded from version 0.11 to 0.12.
It fixes a problem with C<< open my $fh, ">", \$scalar >> not working if
C is a copy-on-write scalar.
It also fixes a hang that occurs with C or C<< >> if a
typeglob has been assigned to $scalar [perl #92258].
=item *
L has been upgraded from version 3.15_03 to 3.15_05.
It corrects the search paths on VMS [perl #90640]. (5.14.1)
=item *
L has been upgraded from version 2.27 to version 2.28.
It no longer turns copy-on-write scalars into read-only scalars when
freezing and thawing.
=item *
L has been upgraded from version 0.27 to version 0.29
Large number of Request Tickets resolved.
=item *
L has been upgraded from version 1.9721_01 to version 1.9722.
Portability fix, and avoiding some compiler warnings.
=item *
L has been upgraded from version 0.73 to version 0.76
Updated to CLDR 1.9.1
=item *
L has been upgraded from version 1.10 to version 1.12
Fixes for the removal of F from core.
=item *
L has been upgraded from version 0.13 to version 0.15
=back
=head2 Removed Modules and Pragmata
As promised in Perl 5.14.0's release notes, the following modules have
been removed from the core distribution, and if needed should be installed
from CPAN instead.
=over
=item *
C has been removed from the Perl core. Prior version was 20110228.00.
=item *
C has been removed from the Perl core. Prior version was 0.72_01.
=back
=head1 Documentation
=head2 New Documentation
None.
=head2 Changes to Existing Documentation
=head3 L
=over
=item *
Added portability caveats related to using C on forked process.
=back
=head3 L
=over
=item *
Documentation for C now includes a pointer to F (5.14.1)
=item *
C, C and C are now listed in L (5.14.1).
=item *
The examples for the C